Let \( f(x)=\frac{x^{2}-9 x+20}{x-[x]} \) (where \( [x] \) denotes ...

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Let \( f(x)=\frac{x^{2}-9 x+20}{x-[x]} \) (where \( [x] \) denotes greatest
P integer less than or equal to \( x \) ), then

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(a) \( \lim _{x \rightarrow 5^{-}} f(x)=0 \)
(b) \( \lim _{x \rightarrow 5^{+}} f(x)=1 \)
(c) \( \lim _{x \rightarrow 5} f(x) \) does not exist
(d) none of these
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